auth0-auth-js

Mono Repo, containing SDKs for implementing user authentication in JavaScript applications.

20 articles 9 View on GitHub ↗
20 articles
Migration Path from Deprecated getTokenForConnection to exchangeToken in Auth0 Auth JS

Migrate from getTokenForConnection to exchangeToken in Auth0 Auth JS with ease. Learn the simple renaming process and leverage the new unified API in v1.2.0+ for seamless token exchange.

migration-guide
Feb 25, 2026
How to Configure authorizationDetails for Rich Authorization Requests in Auth0-Auth-JS

Learn to configure authorizationDetails for Rich Authorization Requests in Auth0-Auth-JS. Easily pass authorization details via the SDK for secure, streamlined access.

how-to-guide
Feb 25, 2026
How the TokenResponse Class Parses Token Endpoint Responses in Auth0-Auth-JS

Explore how the TokenResponse class parses token endpoint responses in Auth0-Auth-JS. Learn how it converts payloads into typed objects with ID token claims and expiration timestamps.

internals
Feb 25, 2026
Auth0 Auth JS Error Classes and OAuth2Error Wrapping: A Complete Guide

Explore Auth0 Auth JS error classes and how the SDK wraps OAuth2Error. Understand error codes and access the raw OAuth 2.0 error payload for complete observability.

deep-dive
Feb 25, 2026
How to Use exchangeToken with Organizations for Multi-Tenant Authentication

Learn how to use exchangeToken with organizations for multi-tenant authentication in Auth0. Pass the organization parameter to scope access tokens to specific tenants.

how-to-guide
Feb 25, 2026
initiateBackchannelAuthentication vs backchannelAuthentication in Auth0-Auth-JS: A Complete Guide

Understand the difference between initiateBackchannelAuthentication and backchannelAuthentication in Auth0-Auth-JS. Discover when to use each for complete CIBA flow control.

deep-dive
Feb 25, 2026
How Auth0‑Auth‑JS Handles Token Expiration and When to Re‑exchange Tokens

Learn how Auth0-Auth-JS handles token expiration automatically and when you need to re-exchange tokens. Discover clear guidance for your application.

deep-dive
Feb 25, 2026
Auth0 MAX_ARRAY_VALUES_PER_KEY Limit: Why Arrays Are Capped at 20 Values in auth0-auth-js

Understand the MAX_ARRAY_VALUES_PER_KEY limit in auth0-auth-js. Discover why arrays in the extras parameter cap at 20 values to prevent DoS attacks and ensure stable payloads.

internals
Feb 25, 2026
How the exchangeToken extra Parameter Works in Auth0 Auth JS: Security Risks and Implementation

Understand the Auth0 Auth JS exchangeToken extra parameter. Learn about security risks like data leakage and injection, and how the SDK protects your application.

deep-dive
Feb 25, 2026
How Auth0 Auth JS Builds Logout URLs for Tenants Without end_session_endpoint

Learn how Auth0 Auth JS handles logout URLs for tenants missing end_session_endpoint. Discover the SDKs fallback to the legacy v2 logout endpoint for seamless user logouts.

internals
Feb 25, 2026
How `getTokenByClientCredentials` Differs from Other Token Retrieval Methods

Discover how getTokenByClientCredentials uses OAuth 2.0 Client Credentials Grant for M2M authentication. Learn its unique approach compared to user-centric token retrieval methods.

deep-dive
Feb 25, 2026
How to Disable Telemetry in Auth0 Auth JS Using AuthClientOptions

Disable Auth0 telemetry in Auth JS by setting telemetry enabled to false in AuthClientOptions. Prevent the SDK from sending the Auth0-Client header and control your data.

how-to-guide
Feb 25, 2026

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